Patent US1896253A successfully refreshed from Google Patents.
Patent US3293549A successfully refreshed from Google Patents.
US3293549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio communication system for control of locomotives
Assignee: SPX Technologies Inc
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Filing: 1963-09-23
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Granted: 1966-12-20
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Expires: 1983-09-23
Abstract
No abstract record available.
Inventors
- 👤 Herbert W Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:11
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/02; B61L3/08; B61L3/12; B61L3/127; B61L17/00; G; G08; G08C; G08C15/00; Y; Y10; Y10S; Y10S128/00; Y10S128/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD OF REMOTELY OPERATING A VEHICLE BY A SERIAL TRAIN OF SPACED BURSTS OF A MODULATED CARRIER FREQUENCY WHEREIN A TRANSMITTER TRANSMITS A SHORT BURST IN RESPONSE TO EACH KEYING OF THE TRANSMITTER AND THE VEHICLE IS OPERATED AS GOVERNED BY THE CHARACTER OF THE MODULATED CARRIER FREQUENCY, DETECTING EACH BEAT OF A LIVING HEART, PRODUCING AN ELECTRICAL SIGNAL IN RESPONSE TO EACH DETECTED BEAT. AND KEYING THE TRANSMITTER IN RESPONSE TO EACH ELECTRICAL SIGNAL WHEREBY MODULATED CARRIER PULSES ARE TRANSMITTED IN RESPONSE TO AND AT THE SAME RATE AS THE LIVING HEART.
Claim 2
Independent Claim
94 words
A METHOD OF REMOTELY OPERATING A VEHICLE BY A SERIAL TRAIN OF SPACED BURSTS OF A MODULATED CARRIER FREQUENCY WHEREIN A TRANSMITTER TRANSMITS A SHORT BURST IN RESPONSE TO EACH KEYING OF THE TRANSMITTER AND THE VEHICLE IS OPERATED AS GOVERNED BY THE CHARACTER OF THE MODULATED CARRIER FREQUENCY, DETECTING EACH BEAT OF A LIVING HEART, PRODUCING AN ELECTRICAL SIGNAL IN RESPONSE TO EACH DETECTED BEAT. AND KEYING THE TRANSMITTER IN RESPONSE TO EACH ELECTRICAL SIGNAL WHEREBY MODULATED CARRIER PULSES ARE TRANSMITTED IN RESPONSE TO AND AT THE SAME RATE AS THE LIVING HEART.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |